Kirby is one of those franchises that kind of sneaks up and surprises you when you least expect it.
Every so often Nintendo will be like “hey, there’s a new Kirby game coming out soon, buy it!” It seems to sell well enough to warrant them doing that every few years, whether it’s a spinoff, a spinoff of a spinoff, or a mainline entry.
Kirby Fighters 2 is another spinoff in a long line of them; but it doesn’t really do anything drastic enough to warrant anyone turning their head.
Source: Destructoid Review: Kirby Fighters 2