I feel that cartoonish art styles are better for platform fighters because
- Cameras tend to be further away in platfighters, and stylised characters are usually easier to give strong silhouettes
- Platfighters often have more variance in character sizes, and it's hard to justify a rodent-sized character with an anime or realistic aesthetic (helps that fighting a child isn't as frowned upon with a cartoon art style as it is with realism - though that does apply to anime styles somewhat too)
- Platfighters heavily rely on air mobility, and generally bing-bing-wahooing around makes more sense for Scrimblos.
- The concept of defeating a foe by knocking them off screen instead of exhausting/killing them is, as normal as it seems now, quite comical
- Platformers, in general, are associated with cartoonish art styles.
