- Never Say Xever: This episode marks their very first appearance. They have been threatening Mr. Murakami in order to extort protection money, but he refuses to pay. They begin to bust up his noodle shop, but the Turtles then arrive, easily defeat them,and tell them to leave the shop. Later, they all abduct Mr. Murakami and help Xever Montes, Chris Bradford and the Foot Clan defeat the Turtles, but Fong assists Leo as repayment for Leo showing him mercy in Mr. Murakami's noodle shop.
- Panic in the Sewers: They help Dogpound and the Foot Clan hijack a tanker truck full of Cholorolsulfonic acid to kill Splinter and the Turtles.
- Mousers Attack!: They successfully steal April's cell phone with the intention of bringing it back to Dogpound. However, the Turtles arrive at the gangs' hideout to cease this plot. Everybody is then interrupted by the M.O.U.S.E.R.S. of Baxter Stockman, who find their way into the gang's hideout and begin to steal from the Purple Dragon's hidden stash. Fong is eventually able to get April's phone to Dogpound who, in turn, forces Baxter to try and hack into the phone, but the scientist is not successful.
- The Pulverizer: They steal several robotic Kraang Droid parts and give them to Baxter Stockman so that he could activate the full function of Fishface's mechanical legs.
- Showdown: They appear to watch the Technodrome and run from the Kraang, who try to abduct them.
- The Good, The Bad, And Casey Jones: They are shown trying to grab a wallet from a New York citizen, until Casey Jones comes out and threatens to beat them up. Casey does indeed beat them up, but the injured Purple Dragons are able to escape, much to Casey's dismay.
- A Chinatown Ghost Story: As they opened the Mystic Dagger that they stole for Ivan Steranko from a museum, he released a deranged ghost named Ho Chan. Ho Chan gave all three Purple Dragon members the power of lighting, thunder, and wind. They were his evil minions until Ho Chan discovered the Turtles and gave the Purple Dragons' power to them. When asked by Sid why he did this, Ho Chan replies "Because your'e LOSERS!"
- Casey Jones VS. The Underworld: The Purple Dragons are seen stealing chemicals by order of their new leader named Hun. Casey Jones comes in to stop them but Hun makes very short work of him. They are later seen giving Shredder the chemicals he wanted.
- Meet Mondo Gecko:
- Hun (Current Leader)
- Fong (Former Leader, Second-in-Command)
- Sid (Third-In-Command)
- Tsoi (Weapons Expert)
- Rahzar (Former Third-In-Command)
- Fishface (Former Second-In-Command)
- Baxter Stockman (Scientist)
- Rocksteady (Money Dealer)
- Ho Chan (Former Leader)
- Sid bears a resemblance to actor and martial artist Bolo Yeung.