Marlon appears in Pokémon Black 2 and White 2 as the eighth and last Gym Leader that the player challenges. He is described as a big-hearted Trainer who gives passionate advice.
Marlon specializes in Water-type Pokémon. Upon defeating him, he will reward the player with a Wave Badge and TM55 (Scald). Outside of battle, Marlon is a fisherman who catches Water-type Pokémon which he would later use in future Gym battles.
Marlon is the second Water-type Unova Gym Leader, the first being Cress.
Marlon speaks using a Kyushu dialect in the Japanese version.
Marlon is one of five Trainers whose sprite animation shows him with an irregular entrance, coming from the right side. The others are Aaron, Koga, Janine, and the Shadow Triad.
Being at level 55, Marlon's Jellicent in Challenge mode is the highest leveled Pokémon to be owned by a Gym Leader during the initial battle with them, tied with Giovanni's Nidoking and Rhydon in Yellow.
Names
Language
Name
Origin
Japanese
シズイ Shizui
From シズイ shizui (Schoenoplectus nipponicus / Scirpus nipponicus), a plant that grows in marshes. Also from 滴 shizuku (drop), 水 sui (water), and possibly 井 i (well).