Since he was mentioned in this Kotaku article, there's this opinion of mine that I want to say, however, you may think I'm a jerk for saying that I have no hope for him to join but remember, I like Sparkster too and I wished just like all the others that he can join Super Smash Bros. but he can't and there's a reason why...
1. Somewhere I heard that Sakurai said that only recognizable characters are allowed to join not non-recognizable characters. (If anyone knows where he said this, please add a comment to this blog, so I can add a source.)
2. According to this Japanese fansite: http://music.geocities.jp/mura_bal/game/5/sparkster.html#4 he’s “somewhat” known in the U.S but not Japan, which is the place where he was originally created mind you. Which may be the reason why Konami stopped continuing the series.
If only the Internet can let him have some form recognition, he might, but can't since some believe he's just like the other 90s mascots with attitude, well, I know some people don't think of him that he's one of the mediocre mascots since his first game is pretty good and he's more down to earth than the others.
About the Internet giving him some recognition, as long it isn't a memetic recognition, unless you're one of those people who want it.