What You Seed is What You Get

After earning the Dynamo Badge from Wattson, Ash and co. continue their journey. May insists to go to Fallarbor Town while Ash suggests they go to Lavaridge Town. Max suggests they go to both and Brock decides the order. During the trip, they notice some watermelons float down by the river and have some lunch. Ash then comes up with an idea: Teach Treecko to use Bullet Seed like the Shiftry that attacked them a while back, and as practice, they try it by spitting watermelon seeds. Can Treecko learn to master this move, and who do the watermelons belong too?