<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Mon Aug 18 19:12:06 UTC 2025 -->
<xs:schema elementFormDefault="qualified" xmlns:srt-types="http://fasb.org/srt-types/2025" targetNamespace="http://www.m3-brigade.com/20250818" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:mbviw="http://www.m3-brigade.com/20250818" xmlns:dtr="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="mbviw-20250818_lab.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="mbviw-20250818_pre.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="mbviw-20250818_def.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef"/>
      <link:roleType roleURI="http://www.m3-brigade.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/sic/2025" schemaLocation="https://xbrl.sec.gov/sic/2025/sic-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/spac/2025" schemaLocation="https://xbrl.sec.gov/spac/2025/spac-2025.xsd"/>
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<!-- [WMV6][zwg9ttsov7gqFwDgiRWlZDp2g9JlpumVo5YbvGTO2IY2rkcRv4EQ+IzmeKbkmVrrVmefow8oJpSiKpxhoMrZl2TMQFAP8ZCBJDzKNJEXYWUZUx9jwLrl6NwTzlX3ccVDpvWBiLuuFrj+lNfVv9uzp4preurK8BNAtOPLU3LU9ALHdHtm/F25ywnGqtSkD4t3lHOlxWvoP0nEp13pv6WbvwUPgAhck1jYfmTB9W12PQoArNVIvLqQwvbWe8FFUxsR8tQV+fRA08LW5tbMt2u6c3zMUEZ1N4i4zVO5CuuNcJMm06I9CQzR2Umo/Jz7tQ2dfOX/yvv5XBT1gxOpsjJDeFZE/RuxfChdhK75LZ33GP6iBv6Pk110qsjna/TZCKnGHLBO+ygdTw==] CSR-->
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  <xs:element name="NonManagingSponsorInvestorsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_NonManagingSponsorInvestorsMember"/>
  <xs:element name="OfferingPriceOf1000PerUnitMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_OfferingPriceOf1000PerUnitMember"/>
  <xs:element name="AnyUnitsWarrantsOrdinarySharesOrAnyOtherSecuritiesConvertibleIntoOrExercisableOrExchangeableForAnyUnitsOrdinarySharesFounderSharesOrWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_AnyUnitsWarrantsOrdinarySharesOrAnyOtherSecuritiesConvertibleIntoOrExercisableOrExchangeableForAnyUnitsOrdinarySharesFounderSharesOrWarrantsMember"/>
  <xs:element name="NetProceedsFromThisOfferingAndTheSaleOfThePrivatePlacementWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_NetProceedsFromThisOfferingAndTheSaleOfThePrivatePlacementWarrantsMember"/>
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  <xs:element name="LessDeferredUnderwritingCommissionsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_LessDeferredUnderwritingCommissionsMember"/>
  <xs:element name="LessOverallotmentLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_LessOverallotmentLiabilityMember"/>
  <xs:element name="LessAmountsPaidForRedemptionsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_LessAmountsPaidForRedemptionsMember"/>
  <xs:element name="OrdinarySharesForfeitedIfOverallotmentIsNotExercisedMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_OrdinarySharesForfeitedIfOverallotmentIsNotExercisedMember"/>
  <xs:element name="OrdinarySharesOfferedAndSaleOfPrivatePlacementWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_OrdinarySharesOfferedAndSaleOfPrivatePlacementWarrantsMember"/>
  <xs:element name="LessOrdinarySharesRedeemedMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_LessOrdinarySharesRedeemedMember"/>
  <xs:element name="SponsorMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_SponsorMember"/>
  <xs:element name="CantorFitzgeraldCoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_CantorFitzgeraldCoMember"/>
  <xs:element name="OverallotmentOptionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_OverallotmentOptionMember"/>
  <xs:element name="M3BrigadePartnersLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_M3BrigadePartnersLLCMember"/>
  <xs:element name="WorkingCapitalMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_WorkingCapitalMember"/>
  <xs:element name="SPACInitialShareholdersMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_SPACInitialShareholdersMember"/>
  <xs:element name="OfficersAndDirectorsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_OfficersAndDirectorsMember"/>
  <xs:element name="IndependentDirectorsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_IndependentDirectorsMember"/>
  <xs:element name="spacTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="mbviw_spacTable"/>
  <xs:element name="spacLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_spacLineItems"/>
  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mbviw_DocumentAndEntityInformationAbstract"/>
</xs:schema>
