Since I only can find Silver, Gold, Yellow, and Blue I'm currently playing Yellow on my Gameboy...that is in bad condition but I can still play games. It's alright, the graphics are sucky compared to the ones I saw for Diamond. I'm in Mt. Moon cave now(just started a new game yesterday) and my Pokemon are
Pikachu
Mankey
Nidoran(girl)
Zubat
It's been a few years since I played Ruby(lost it) but couldn't you use fly, dig, cut, etc... without teaching it to a Pokemon?
It brings back memories(goes into girl mode) from when I was 8 and I first got the game. I named my character Ash, and my opponent Gary. I'm sick of seeing Ratatta(sp)...did anyone ever bother to catch one?