It's almost always hilarious to see a mistake in the anime. For example, Brock said that water pokemon are weak against water pokemon and then Krabby or Kingler got killed by a Growlithe's fire blast. Also there's: "Finish him with a false swipe!" Also an Ekans or something used acid or something on a steel type, and the steel was melting (which actually makes a lot of sense for acid). As well as the Arbok evolves into Seviper mistake. If you remember any anime mistakes you can post them here.