He might not be able to do much because of his size, but Diarmuid would try. That counts, right?

"Oh, yes!" Diarmuid gives Bulbasaur one last friendly pat and then pulls himself to his feet, "I saw a poster! A poster about berries! It said you had extra berries Pokemon can eat? I wanted to ask if I could have some for Lir." He holds the horsea out, "Plus it's about time he had a check up again. I thought this was as good a time as any!"