Well I don't know if this topic or the general community topic is better for opinions on teams, but I'll give it a shot here.
I want to use a team of favourites together but I'm having difficulty deciding on the last member. It's down to either Chesnaught or Ambipom. Here are the other team members for reference. I don't have the EVs planned out yet.
Pikachu @ Light Ball
Lightningrod
Naive
Thunderbolt, Brick Break, Grass Knot, Hidden Power (Ice) (This is going to be a pain to get.)
Togekiss @ Leftovers
Serene Grace
Calm
Dazzling Gleam, Air Slash, Roost, Thunder Wave/Aura Sphere
Reuniclus @ Life Orb
Magic Guard
Modest
Psychic, Shadow Ball, Focus Blast, Recover
Mega Lucario @ Lucarionite
Adaptability
Jolly
Close Combat, Bullet Punch, Crunch, Earthquake
Samurott
...Not sure. I'll wait to see what his movepool additions will be but I'd probably go with a mixed set and Weakness Policy.
So that leaves Ambipom and Chesnaught. My team lacks speed, so that's where Ambipom would come in. However, I also lack someone who's bulky on the defensive side. I'm not sure which Pokemon could help out better. Moveset wise, I do like Letterbomb's flinching Ambipom set. If I were to use Chesnaught, I'd probably do something like Synthesis, Spiky Shield, Hammer Arm and Wood Hammer.
Any input would be greatly appreciated!