A comedy about a former genius who has now become very eccentric and senile. His family deals with all the crazy problems he and his old friends cause around the neighborhood. (Source: AniDB)

The fourth season of Future Card Buddyfight.

Mysterious cards came down from the sky one day. Capable of summoning powerful creatures from another dimension, they became the centerpiece of a new game called Bakugan. The game gained instant popularity among children and teenagers, with the best of them competing in a worldwide ranking. Meanwhile, war for domination over Vestroia, the homeland of Bakugan cards, rages on. Invaded by the White Dragon Naga and his servants, the Doom Beings, the realm becomes increasingly destabilized. Dimensions begin to merge and many Bakugan players come to realize that their pastime is not merely a game. Danma Kuusou, one such Bakugan player, intends to become the World Ranking's leader someday. However, during one of his fights he experiences a vision of a clash in Vestroia. The fight suddenly moves to Earth, where Danma comes into possession of a talking, mighty fire Bakugan, Pyrus Dragonoid. He soon gets dragged into the conflict, and together with his Bakugan Brawlers team, must traverse the dimensions and restore balance in a ravaged world. [Written by MAL Rewrite]

What does a bear know about life in the big city? For Machi Amayadori's sake, hopefully a lot! The young shrine maiden has spent her whole life in the rural mountains with Natsu, her talking guardian bear. Now, at fourteen, she wants to take a chance and attend high school in the big city. Can Natsu really prepare her for city life? Or will his wacky trials be too much for even Machi to bear?