Theoretically possible for sure. Hall of Fame warp is actually pretty much ready, I have a teleport anywhere code just waiting in my PC, at some point I'll do a document for index values of locations just like the Emerald and FRLG ones I have and then the teleport anywhere code will be available for anyone. An actual credit warp is different but there is nothing unheard-of about it, it's likely possible. Consider though that, until a native form of ACE is found, this glitch is illegal in speedruns so an actual credit warp might not be that useful