CONSOLIDATED BALANCE SHEET	Dec. 31, 2025 USD ($)
Current assets
Cash	$ 212,099
Prepaid expenses - current	191,667
Total current assets	403,766
Non-current assets
Investments held in Trust Account	176,338,275
Prepaid expenses - non-current	78,833
Total non-current assets	176,417,108
Total Assets	176,820,874
Current liabilities
Accrued expenses	1,826,861
Due to related party	$ 45,000
Other Liability, Current, Related Party [Extensible Enumeration]	Related Party [Member]
Accounts payable	$ 180,140
Total current liabilities	2,052,001
Non-current liabilities
Deferred underwriting commissions	5,175,000
Total non-current liabilities	5,175,000
Total Liabilities	7,227,001
Commitments and Contingencies (Note 7)
Shareholders' Deficit
Preference shares, $0.0001 par value; 1,000,000 shares authorized; none issued or outstanding
Accumulated deficit	(6,745,035)
Total Shareholders' Deficit	(6,744,402)
Total Liabilities, Class A Ordinary Shares Subject to Redemption, and Shareholders' Deficit	176,820,874
Class A Ordinary Shares subject to possible redemption
Non-current liabilities
Class A Ordinary Shares subject to possible redemption, $0.0001 par value; 17,250,000 shares issued and outstanding at redemption value of $10.22 per share	176,338,275
Class A Ordinary Shares not subject to possible redemption
Shareholders' Deficit
Ordinary shares value	58
Class B Ordinary Shares
Shareholders' Deficit
Ordinary shares value	$ 575

Amount of deferred underwriting commissions.

No definition available.

Name:	mcga_DeferredUnderwritingCommissions
Namespace Prefix:	mcga_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).