Ike had high speed because pretty much every FE protagonist is warranted to have very good stats. Robin can also have good speed in his game.
HA,
tell that to the GBA Lords. They're all universally subpar to the god-units they get during the story.
RIP Viable Lyn past the tutorial.
And actually, Ike
is that fast.
If you actually look at his cutscenes and in-game combat animations, he's extremely fast and acrobatic.
Like, at his most basic level, PoR Ranger Ike, his critical hit involves him
going so fast he cuts the enemy so fast it looks like he teleports behind the enemy.
And by the end of that game, he's regularly doing backflips and giant leaping slashes. He's essentially swordmaster speed with berserker strength.
Compare that with Robin's cutscenes and animations and it's definitely not as impressive.
I mean it makes sense considering Ike is just Fire Emblem's Guts.