not sure if it is a glitch, but on Red/Blue, you can defeat Lance's Dragonite with a lv2 Zubat with toxic. For some reason his Dragonite only uses agility against Zubat. I'll try to provide a video about this...
edit: here I have a video http://www.youtube.com/watch?v=WDEB7lzMXvY
As the description explains, in first gen artificial intelligence works so that a poke uses always a super-effective move if it has one. Agility is psychic type so Dragonite spams it vs the poison type Zubat
edit: here I have a video http://www.youtube.com/watch?v=WDEB7lzMXvY
As the description explains, in first gen artificial intelligence works so that a poke uses always a super-effective move if it has one. Agility is psychic type so Dragonite spams it vs the poison type Zubat