Red: Incredibly slow and dopey. It takes 5 seconds for it to feel pain when under attack.Yellow: Incredibly slow and sluggish. It is quite content to loll about without worrying about the time.Gold: It lazes vacantly near water. If something bites its tail, it won't even notice for a whole day.
Prof. Lotus' Notes: Slowpoke is the only Pokemon that has the same weight as it's Pokedex entry number (when rounded). Slowpoke tails grow back, so they are constantly being targetted for cooking.