It's crazy that FOP is nowhere to be seen in any of these given it was basically Nick's no.2 show for the longest time.
I do like the Smash Bros clones quite a bit, though you can really feel the shoestring budget. That said I still think the rosters are quite lacking. Credit where its due though, I'm glad they aren't doing only 90s and modern Nick, especially as someone who thinks the early 00s was Nick at its peak, so it makes me happy to see characters like Jenny, Danny, El Tigre, etc. That said I'd still like to see Henry/June from Kablam, Waffle from Catscratch, Mikey from Kappa Mikey, Kitty Katswell from TUFF Puppy, Bloom from Winx Club, Hector or Miko from Glitch Techs, and finally Timmy Turner. Heck I'd like to see them some of the planned characters from the first game's concept art too(Reggie, Krumm, Wanda and Casey Jones were originally planned for example