Magneton

You calm yourself. Even if you're up against Suicune, you've designed your team to beat water types. So long as you keep to your strategy, you'll win.

"Magneton, Spark!" Magneton should be able to resist anything Suicune can dish out. It's a good way to find out what Misty's taught it while dealing damage. After a few rounds, Suicune manages to beat Magneton by brute force, but it's in no condition to fight Zapdos. The bird rains electric fury on the dog.