Some results of breeding river + thunder are:
There is no thunder dragon.
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in breeding, both dragons need to have all three of these elements, fire, ice and thunder, you can get either of the two eggs. To breed them you can use Bluefire and Crystal, Ice and Scorch and so on, but, if you don't breed with the three elements you probably wont get them.
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gober
first of all, there are no bonus dragons, you just need to wait for them to be seen in the show, like thunder drum, skaldrun and typhoomerang
How to get thunder wave on pokemon gold you can go in dragons den and there you can catch draniti who already knows thunderwave
The sound that results from the rapid expansion of air along a lightning strike is called thunder. Thunder is caused by the heating and rapid expansion of air around the lightning bolt, creating shock waves that we hear as a loud rumbling noise.
Thunder drums dragons eat many things. In wild sky's they eat crabs. I have a REAL Thunder Drum, named Clash. Clash's favorite food is crawdads.
The most effective way to breed a storm dragon is lightning (lv 10 right) and cold (lv 10 left). This has about a 77% success rate.
You have to beat the bosses.
Go to Wreckers Reef and go to the lair and feed it crabs and fish.