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Schedule of accruals and other payables (Details) (Parenthetical)	Dec. 31, 2024 HKD ($)
Notes and other explanatory information [abstract]
Customer loyalty programmes	$ 2,290,851

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- Definition

Customer loyalty programmes.

+ References

No definition available.

+ Details

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Namespace Prefix:	MB_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	ifrs-full_NotesAndOtherExplanatoryInformationAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration