Both of these have seen tremendous competitive play in a variety of formats, filling similar roles but having different utility depending on the format and metagame
Wigglytuff from the Darkness Ablaze set has a very efficient attack called Sleep Pulse that deals a bit of damage and is guaranteed to put the foe to sleep for the cost of a single Psychic energy
Goblin and Zombie decks have rocked tournament tables in the not too distant past, and even in recent Standard we've seen Mice and Rabbit decks making waves
For the most part, its done by emailing or registering online via the store website, or just by showing up and asking to join
Arceus VSTAR has an attack named Trinity Nova , which deals 200 damage and can let you look for three basic Energy Cards on your deck and attach them to your Pokemon V
The other cards have potential, but Boltund V is just downright great