Piplup is great.Piplup may be weak with a cỏ type but it's super effective with drill peck and peck.Piplup is super effective with ngọn lửa, chữa cháy types too.As for electric types,you have to envolve piplup to learn dig.Also when bạn envolve it, bạn can learn cỏ knot to beat water types so easily!Don't forget it can also envole to Emploen and learn hydro cannon!And don't for get metal claw either!Piplup is also very strong with it's torrent ability.Piplup is cute and when it envoles to Emploen,it looks tough and it may be too!Also,if bạn had a piplup, it can learn surf and waterfall when it envoles and then bạn could meet the champion!Remember,first is a bug trainer so bạn can beat with flying type moves like peck hoặc drill peck.Next is ground which bạn can use cỏ knot.Third is kind of ngọn lửa, chữa cháy so Piplup can beat them easily with a water type move.Last, is a phychic type but I have no advice.Finally,the chamion's strongest pokemon is Milotic so bạn can use cỏ knot!