It was not Throw Me a Bone. I remember playing that one as well. And my memory is perfectly fine, it's actually above normal (I had that tested. Go autism!). I vividly remember playing Chain Chomp Fever recently in Mario Party 6. And this isn't a bootleg either. I just went through my mini-game list before posting this topic (apparently, I'm missing two Bowser Mini-games :P) and everything seems "normal." Chain Chomp Fever is nowhere in sight. Throw Me a Bone is the only Chain Chomp mini-game and Burnstile is the only lava-themed one, but I'm not confusing those together either. I legit remember playing this game not even five days ago.
Thing is, this is actually a normal occurrence for me. It's like life just went "Know what? This wasn't right, let's fix it." but I'm the only one who remembers the change. I don't expect anyone to understand that, but that happens to me pretty much on a yearly basis.
I guess I'm not expecting anyone to help solve this "problem." Just felt like...doing whatever I'm doing here.