Handwave: The abridged series never tries to explain why Marik is up and possessing bodies again after having his soul literally disintegrated by Melvin a few episodes prior. According to Marik, "It's a Long Story that involves the name Steve".
Hello, Insert Name Here: Noah's poorly programmed Kaiba hologram refers to Mokuba as "Insert-Name-Of-Sibling-Here".
Mokuba: He remembers my name!
Hipster: Marik makes sure to tell Crump that he was possessing Tea's body before it was cool.