Link is bad in every Smash Bros., which is hilarious since he’s probably the most popular. Several characters barely moved between Melee and Brawl (Marth, Falco, Ice Climbers), but I think Link has moved the least throughout the series.
I think Carl has been high tier in every BlazBlue, but I might be mistaken.
Generally, these are things that lead to consistent high tier characters.
Disjointed hitboxes or extremely large hitboxes
High power without a mobility/speed loss
Really good mixups
Low health, no other real weaknesses (See: Any Capcom fighting game.)
Other abilities, like amazing zoning or a good dragon punch, tend to be more game specific since they’re tied to the game mechanics.
He also was terrible in Soul Calibur 2. It’s funny, because you’d expect a guy with bombs, a boomerang, a bow, a shield, and a sword (Disjointed hitboxes ahoy!) to be awesome, but he’s always really slow and clunky.
Magneto was high-tier/God-tier in CotA, Xmen vs Street Fighter, both versions of Marvel vs Capcom 3, and Marvel vs Capcom 2.
Zero definitely has a solid track record; he’s been an exceptional character in every game he’s been in. Ken Masters is another one. While not always a high tier, he’s at least a decent character in every game he’s been in. The only game I remember Ken being terrible in is Pocket Fighter, due to the the level up system giving him worse special moves over time. I dunno, maybe he spilled grape juice on the dev’s white carpet or something.
Also, Roll’s generally low-tier in every game she’s in. She’s not garbage in TvC, but compared to the other characters she’s a bit lacking.
Wasn’t that a 3-game streak? Iron Man was pretty solid in MSH IIRC.
Mags is decent in MSH, easy aircombo > tempest > whatever you want including more tempest. but everyones kinda good in MSH, due to no auto grab recoveries, and alot of air combo enders not being hard knockdown. Such as Cap America getting ANYTHING after the K grab, including full-hitting final justice, and his j.fp knocking you up/away ala XSF Cyclops, or Shoto U.HK air combo.