Let's see...
- "New Friend, Old Enemy" could basically work in any cartoon. It's not hard to imagine any cartoon version of Mikey being tricked by a secret villain like that.
- "Monkey Brains" could work in 4Kids provided Falco is separate character from the Rat King. I think it could also work for Tales. FW and Rise seem a bit too silly for that plot.
- "The Pulverizer" is not too dissimilar from the Zach episodes of FW or the episode with that slacker in Tales.
- "The Pulverizer Returns!" I suspect will essentially get remade in Tales.
- "Parasitica" could work in 4Kids.
- "Invasion of the Squirrelanoids" I could see in Rise and Tales. It seems too dark for FW yet too absurd for 4Kids.
- "Slash and Destroy" is another episode I essentially imagine will get remade in Tales.
- "Fungus Humungous" might as well be a remake of the Lovecraftian episode of 4Kids but is distinct enough to work as it's own story.
- "Pizza Face" barely fits into FW (superficially dark) and I could see it happening in Rise.
- "A Foot Too Big" is basically a sillier take on the concept of a bigfoot hunter in 4Kids. Not sure if it was intentional but still.
- "The Noxious Avenger" as previously stated is a remake of a FW episode already, slightly grosser maybe but essentially the same.
- "Meet Mondo Gecko" might as well be a Rise episode.
- "The Weird World of Wyrm" shares one of the... Uhm... More infamous aspects that many episodes of FW have, please look it up if you have no idea what I'm talking about.
- "The Outlaw Armaggon" does seem like the sort of DC/Marvel homage that you would see in 4Kids.
- "The Arena of Carnage" is bizarre in the sense that it seems more like a remake of its 4Kids counterpart than an adaptation of the comic book story it was based on in the first place.
And that's about all the ones I can think of without needing to rewatch them.