In Wario Land, if you pause the game, then press Select sixteen times, you can change the numbers in the status line with the D-pad if you hold A and B. If you move the cursor to Wario’s head and unpause, he will power up.
The manual tells you the Select button is “not used”.
From a commercial for the GI Joe style Street Fighter II toys, and I think this is probably the most menacing live-action M. Bison ever committed to film. Raul Julia is great, but he’s hardly threatening.