Pokemon Scramble! - EX Mode - Grade EX Level 1 - Capturing Venusaur

Although this says Venusaur you can actually fight any evolution of bulbasaur. Differences in EX are that the levels have been upped a bit (to 2000 range) and the bosses are supposed to be harder. You can also catch normally, very rare pokemon, easily in these levels because there is a higher % of rares in them.