I'm not really into THIS game-version (only original SM64), so I don't know whether ①there is an ABC-crew existing at all ②most stars are already at 0xA ③a cannon can be openend AND used without the use of the jump-button...but i coincidentally stumbled upon this video here: May it be useful? Watch at 3:10

This glitch is extremely well-known, and used a fair amount in the B Button Challenge: