Which Nintendo First Party IP character would make it in Smash Bros Ultimate under the right circumstances?

I would say Waluigi, as the main reason why he didn’t make it in/ruined his chances was that people were harassing and sending death threats to Sakurai for him to make it in ([https://www.nintendolife.com/news/2018/06/super\_smash\_bros\_fans\_are\_harassing\_masahiro\_sakurai\_over\_waluigi\_snub](https://www.nintendolife.com/news/2018/06/super_smash_bros_fans_are_harassing_masahiro_sakurai_over_waluigi_snub)), so if he did feel like it, this really ruined Waluigi’s chances for good. But hey, if Twitter users didn’t do this, he could’ve had a much better chance as he was one of the remaining Nintendo First Party IP that could be used