Wailmer are known to bounce atop the surface of the water, both as a means of eating Wingull and escaping predators like Sharpedo, but if anything they are bouncier on land. It is not a rare sight to see rubble in coastal towns with a Wailmer-shaped hole in the center, for there are precious few construction materials sturdy enough to withstand their onslaught.
A bouncing Wailmer is a fascinating sight so long as it is not one's own home at risk. The creation of obstacle courses for Wailmer began as a means of training them to dodge buildings instead of crushing them, but became a popular spectacle and soon an annual festival in many coastal towns in Hoenn. And for the Wailmer entrants – mostly trained, but a few wild and curious – who learn to control their bouncing, it is an occasion for immense joy.
The event is as much a show of tactics as of raw power, for Wailmer bounce on each other for an added boost, bounce over some of the hastily constructed obstacles (many fifty feet high in larger cities) but use others as leverage, and a few avoid jumping entirely and simply attempt to roll through it, demolishing some from the side instead of the roof and dodging those large enough to stop their momentum. Nearly the whole town's population watches, although it is difficult to find a vantage point from where one can see the entire course, and unless one is a trainer it is harder still to tell the competing Wailmer apart. Yet the excitement comes not from finding the winner, but from watching the great blue ball whales bounce athletically through or over shoddy replicas of the town's landmarks, or watching said landmarks get smashed to pieces by rampaging pokemon.