there are NOT two different frequencies of wavebird controller for the gamecube. if your controller AND receiver are BOTH OEM & in good working order, with fresh batteries you should have NO PROBLEMS syncing them up. i have 5 receivers and more controllers. most have been pieced together by me, and there’s no telling what the person who owned them before me has done. i’ve switched them around and swapped them between consoles over the years, and i’ve seen absolutely no evidence to the contrary. as long as theyre set to the correct channel they should sync fine. if you’re gonna be using the wavebird controller exclusively i suggest 1st investing in x2 sets of batteries for each controller, so you can swap out fresh batteries as you go. you want rechargeable NiCad batteries by a reputable brand like duracell or energizer (because you get what you pay for). that way your signal will always be strong & your controller true! secondly remember to always be having fun or else what’s the point? enjoy!