When air masses meet. When a moving cold air mass meets a warm air mass, that is lighter, it tends to wedge below the latter, thus giving origin to a cold front. The warm air is forced upwards and its ascent causes the formation of clouds.
Strategies and More Information. Tyranitar is a big Rock/Dark PokÃ©mon, but it is sometimes considered to have Dragon traits, even though it has no Dragon type. Tyranitar comes with the ability Sand Stream which summons a Sandstorm. It generously helps Rock, Ground, and Steel type PokÃ©mon by causing a little damage to other types every turn. It will also boost a Rock type PokÃ©mon's Special Defense one stage (50%).
Dark type PokÃ©mon are strong against Psychic and Ghost types, however are weak against Fighting, Bug, and Fairy types. Dragon-type. Dragon-type PokÃ©mon are, quite simply, dragons. Their moves involve the use of claws and breath. They are one of only two types, the other being Ghost, to be Super Effective against its own type. Not all dragon-like PokÃ©mon are Dragon-type PokÃ©mon; for example, Charizard is a Fire/Flying type, Gyarados is a Water/Flying type, Lapras is a Water/Ice type, Aerodactyl is a Rock/Flying type, Steelix is a Steel/Ground type, Tyranitar is a Rock/Dark type, Sceptile is a pure Grass type, Aggron is a Steel/Rock type, and Milotic is pure Water type, but a select few are in the Dragon breeding ...