I'm not going to lie to you. The Gen 5 games are easily the most forgettable games in the franchise's history. I mean, we went from Gen 4, which had amazing Pokemon like Infernape, Garchomp, Lucario, the creation trio, and Arceus, to Gen 5 and the Elemental Monkeys. It also didn't help that the Gen 5 anime stunk up the joint compared to Gen 4 (which is my favorite one after XY(&Z) because of how badass Ash was there). (My apologies to those Gen 5 fans that think otherwise.) However, I do like one thing about Gen 5: the Legendaries. In particular, this Legendary.
Now yes, I know that Zekrom indirectly made Ash's Pikachu lose to a level 5 Snivy (though, apparently Ash forgot about Iron Tail and Quick Attack the whole battle too...), but even with that minor hiccup, I still love this Dragon and Electric type. Plus, there's Fusion Bolt and Bolt Strike. Nuff said.