Hi I just got a gameboy pocket and Mario land how can I tell what version it is (to the do the side Glitch thing sorry idk what it’s called)

Assuming this is correct: https://forum.speeddemosarchive.com/post/how_to_identify_your_games_version__how_to_identify_fake_gba_carts.html

1.0 should have 2 numbers imprinted, with nothing after it.

But since that glitch is very trivial to perform (just hold left at any place where you can be pushed of screen, eg. at the very beginning of 2-3 by the destroyable blocks), you can just try it to confirm whether it works or not.

ok thaks