Roserade. Back when I first started Reborn, I figured that I needed a Grass-Type. I saw that Budew was towards the beginning and I've never used the Budew Line before in-game. I grinded out it's happiness early-on so he wouldn't be a weak Baby Pokemon for too long. I retrieved the first Shiny Stone on Azurine Island then thought to myself: "Maybe I should save this Stone and breed for HP Fire, Leaf Storm, and Sludge Bomb...". So I did that when the level cap allowed it a little bit afterwards (lvl 47 Eggsecutor). Also, Roserade is a great abuser of Grassy Terrain which was introduced in 6th gen. Buffing both Technician HP Fire and Leaf Storm by 1.5x. Overall, Roserade is probably the second MVP on my team and was worth the Breed Chain that I want through!