To catch entei I recommend doing the level 39 poke with repel trick where everyone else is weaker so only legendary doggys can appear since they are higher lvl. I recommend putting it to sleep, and using false swipe so it can't use roar, and you don't kill it accidentally. Smeagle with spore, false swipe, and any trapping move will work well, and I think is the easiest to learn all 3 you need. I definitely recommend giving it the speed, and attack steroids unless you want to actually ev train but that's too much work for me.
