Algol is not banned anymore.
I wouldn’t be surprised if the both Justice and Kliff have 5:5 matchups against Eddie.
Traditionally, the only stuff that gets banned are:
- Stuff that breaks/locks up the game
- Stuff that grants one character or one side too big an advantage
- Stuff that’s in the console but not in the arcade*
- Grossly overpowered characters whose only counters are themselves**
*The standard of using “arcade only” rules is slowly starting to fade away, with many modern fighters either having no arcade version or having an arcade version that only a minute minority have played. From now on it will probably be on a case by case basis, but expect this rule to be informally abolished at some point.
**The actual number of officially banned characters is very small. It’s usually reserved for noticeably overpowered characters, normally [hidden] bosses (ST Akuma, Omega Rugal/most KoF bosses, etc). There are numerous gray areas, such as in 2I where Akuma is almost as bad as his ST self, but Ibuki is also just as bad when facing the rest of the cast, and neither are banned. Anyway, suffice to say that banning a character completely in a “proper” tournament (i.e. as opposed to some podunk tournament in some guy’s basement) is usually a very rare event and is seldom done without justification.