Metaion" returns all other monsters on the field back to the hand, and inflicts 300 damage per monster to the opponent. In the anime, if only returns the opponent's monsters.
"Lazion" returns all cards in your opponent's Graveyard into the Deck. In addition, it inflicts 500 damage to your opponent when they draw a card(s). In the anime, it returns all cards in the opponent's Graveyard as well as all monsters they control to the Deck, and inflicts 1000 damage whenever they draw a card(s) during their Draw Phase.
"Zaphion" returns all Spell and Trap Cards the opponent controls to the Deck. In the anime, it had the additional effect of allowing its controller to draw until they had 5 cards in their hand when it left the field (including if it is returned to the Main Deck).
"Sadion" makes its controller's LP become 4000, if their LP is lower than 4000.
"Kamion" returns 1 monster your opponent controls into the Deck and inflicts 500 damage to your opponent. In the anime, it returns all monsters they control instead and inflicts 500 damage for each.
"Michion" halves your opponent's LP. In the anime, it inflicts damage to your opponent equal to half their LP.
"Hailon" inflicts damage to your opponent equal to the difference between your and your opponent's LP, but only if your LP is currently lower than your opponent's. In the anime, it activates regardless of whose LP is higher.
"Raphion" inflicts damage to the opponent equal to the ATK of the monster it battled. In the anime, it returned that monster to the hand and inflicted damage equal to its ATK.
"Gabrion" returns 1 card your opponent controls into the Deck. In the anime, it returns all cards your opponent controls to the Deck.
"Sandaion" inflicts 2000 damage to your opponent. Furthermore, your opponent takes no battle damage from attacks involving it. In the anime, it inflicts 4000 damage instead, and it is able to inflict battle damage.