In an interview with Dragon Quest series creator Yuji Horii by RPG Site revealed his thought of the inclusion of Hero in Super Smash Bros. Ultimate.
When asked how he felt about the inclusion of Hero in the game, Horii said he’s “very happy”. He also said that it wasn’t him that wanted to see Hero in Smash – it was Masahiro Sakurai, the director of Super Smash Bros. Ultimate.
Apparently Sakurai had been asking about it for a very long time.
RPG Site interview with Yuji Horii
RPG Site: I’d love to know your side of the inclusion of Hero in Smash – how it came about, your reaction to it…
Yuji Horii: I’m very happy that the Hero has been added to Smash! I’m also so happy that they included things like the commands, the MP… and also the character is really strong! [laughs] I’m really happy about that.
Regarding the process of having the Hero in Smash, Mr. Sakurai really wanted to have the Hero in Smash and they’d been proposing it for quite a long time. Also, since Dragon Quest XI was coming out, we felt it was the perfect time for him to join Smash. It’s all thanks to Mr. Sakurai.