Landlord/Appearances

Season 1

 * Ping Pong Wizard
 * The Perfect Roommate
 * Online Romance
 * Friends Forever (mentioned)
 * Heatwave
 * Germinator 2: Zombies
 * Poker Face
 * Museum Madness

Season 2

 * Forgotten Kiss
 * The Sabotage (non-speaking)
 * Landlord In Love
 * Angela The Psychic

Season 3

 * Troubled Couples
 * The Sixth Friend
 * Kids Again
 * The Dance Contest (mentioned)
 * Unfriend 'Em All! (non-speaking)
 * Glitch Apocalypse

Season 4

 * Worst Mayor Ever
 * Mystery Crate Empire
 * Save The Tree
 * Happy Anniversary
 * Escape: Impossible! (flashback)

Season 5

 * Neighbor Roy (cameo)
 * Smash the Trash