SkunkyArt | Akrononym — What if Robin was a Pokemon Trainer

Bronzong: giving its deep connection with ancient times, as well as being able to change the weather, it makes for a fitting addition to her team. Unfortunately, it doesn't really have any fitting attacks that go well with Robin's moveset/character
Attacks: Toxic- Stealth Rock - Heavy Slam - Extrasensory

Absol: a fitting addition ot her team, given that both of them are somewhat cursed in their worlds (with Robin being called a Devil Child and her whole existence being a sin; while Absol is commonly blamed for catastrophes, despite it only wanting to warn people about them). The dark type might work well with Robin's overall rather dark humor. Just like with Bronzong, no real attacks that fit her
Attacks: Night Slash - Payback - Sucker Punch - Psycho Cut

Runerigus: since runes are ancient germanic letters, I think this one makes a fitting enough reference towards Robin's ability to read the ancient language (better so than Unown, who sadly has no attacks/moveset at the current moment). Again, no fitting attacks that reflect Robin in any way
Attacks: Earthquake - Body Press - Protect - Trick Room

Machamp: clearly reflecting her abilities to sprout several different limbs to deal with her opponent, as well as Robin's usage of wrestling moves during combat, it makes a nice fit for her team. Low Kick is a reference towards Robin's "Stomp" attack while Revenge and Retaliate meant to represent the way she broke Spandam's spine at the end of Enies Lobby
Attacks: Cross Chop - Low Kick - Retaliate - Revenge

Ace Pokémon Roserade: a reference towards her initial more mysterious appearance, as well as her more defined and collected manner when compared to the rest of the Straw Hats. It also acts as a reference towards Robin's ability to summon her limbs like flowers. And once more, no fitting attacks
Attacks: Energy Ball - Dazzling Gleam - Synthesis - Sludge Bomb