It's just like it puzzle-wise. "So, I'm moving this pillar - wait a sec, I just did that in golden sun! Light this... I did that in golden sun too! This Treasure Box is a Mimic? That's in plenty of games... So, you anime-like things too? Hey! Why have I seen that in Golden Sun before..?" Just a few comparisons. Oh also Sheba, meet Collete. Collete, meet Sheba. (Hey, they have things in common!)