This is a boxing game in a similar vein to Punch-Out!!, but with slightly different feeling controls and mechanics.
There's a very useful guide on GameFAQs made years ago that details A LOT about the game and some strategies that can be used.
The guide:
https://gamefaqs.gamespot.com/gba/918996-wade-hixtons-counter-punch/faqs/29429
A few things to note:
- There isn't a traditional buffer system for this game (at least as far as I'm aware) like in the Punch-Out games. Or at least, it's one frame before an animation ends.
- You can acess a debug mode during matches. Pause the game and press: Select, L, R, Select. It displays various bits of info about some of the things that are happening in the match. This might be useful, but I'm not entirely sure about it.
- There is no traditional in-game timer. We might as well look for a RAM address that lets us calculate it during matches.
- You can't duck. Only block and dodge left or right. It's like the arcade Punch-Out.
- This game lets you purchase moves from shops. You need a certain amount of cash for each move. You win more money by defeating opponents. You use the special moves by doing a specific button combination when Wade's blue meter is full.
I made test movie to get familiar with the game last year:
http://tasvideos.org/userfiles/info/60131054898700237
Aaaand the current RTA WR:
https://www.speedrun.com/whcp/run/8yvl0pez
That's all the info I have for now I think, posting all of this here just so I don't forget posting it again. :P