Just kick out the eggs you don't want. But I always keep a Black and a Red, since their Ignore Height leads to fun on some maps (like Zeltennia, where they can leap 30 panels straight up to get at the boss)
But you can get Ignore Height with humans anyways. Better yet you can get Teleport, which has innate Ignore Height and ignoring any other obstacles between you and your destination.
And for anyone who doesn't know, Teleport never fails if you move with in your character's Movement range (including equipment, so shoes still matter), and supposedly has a 10% * amount past Movement range if you do go past it to fail, though I swear I have worse odds than that. But at 10 past Movement I have definitely always failed.
I will admit the animation is more amusing with Ignore Height in Zeltennia. But it serves no practical advantage unless you just really don't want to spend time getting a Time Mage ability. (And even then, I'd only consider it for someone I intend to actually use as a Lancer. It really isn't that much faster to get.)
--
"One toot on this whistle will take you to a far away land."
-Toad, SMB3