I would try and evolve into Chesnaught on the bench and put four energy cards on it there, but even if you don't have four energy cards on Chesnaught when it is in the active Pokemon spot, it can still basically attack every turn because of its Ability
Looking for Magcargo prices and values
If someone uses Lightning Bolt to deal lethal damage to your two toughness creature, you already have the chance to defend against that spell while its on the stack
Like most Pokmon cards, the value of Banette depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (HSTriumphant)
But if left unblocked, Three-Headed Goblin will deal a total of 9 damage to the defending player
Any accessible Pikachu promo with appealing artwork and wide distribution is going to generate significant grading demand, and this card checks every box