The match-ups are appearing to be in L's favor, though snikering from Mentalist starts to give Amethyst the shivers. After calming her down, L starts barking out sudden orders.
Ok, Amethyst, let's get this battle on the roll! She's starting to burn you, that's not good, so let's boost our Special Defence with Sandstorm! Once you do that, let's pressure her from dancing and intensify Gravity. Finally, to wrap this round up, let's blast her with Rock Blast!
Dexter, I knew your psychic bossness would help you get a good match-up. Obviously, Blackbeard's not experienced in facing Psychic types and understands they're not effected harshly by hazes and smoke. Oh well, let's make sure he never forgets! First Trick Room, so we have the upper match for teh beginning of the match! After that, launch a Psybeam+Energy Ball Combo (Psybeam accelerates the Energy Ball to have more knock-back, I like to believe), and cool down as he decides to give us a spanking.
Auron, you are facing yourself! That's....weird, to say the least. He seems intent on boosting up first action, so let's brace ourselves with a 15-HP Substitute, so we minimize the damage from Focus Blast next action. I want you to use Circle Throw to reset his stat changes from the previous actions. After that, use Counter to blow back the damage from his Force Palm!
For ease of calcing:
Roggenrola: Sandstorm -> Gravity -> Rock Blast
Elgyem: Trick Room -> Psybeam+Energy Ball Combo -> Cool Down
Riolu: Substitute (15) -> Circle Throw -> Counter