I actually did a Bellossom card before this, but it didn't feel unique enough to submit (though it more than made up for it in cuteness). I felt more inspired to make a rockin' Breloom card after Teapot told me that it was his favorite Grass-type besides Celebi or Venusaur. It was difficult to come up with something truly unique; Grass-types really have had like everything known to Pokemon. Offhand, I only know of three cards in the TCG that can increase their own HP, and none of them are Grass, but that doesn't mean one doesn't exist.
The second attack (a uniqueness among BW-era cards that have abilities) is strong, but not too strong. It gets ridiculous in power if you're almost dead, and it almost requires you to use Bulk Up beforehand (Giant Cape would allow it from 10 HP remaining, which is fine).