After some initial bickering, the brothers successfully catch a Buizel and a Corphish .
Ash and Cilan team up against the brothers. Soren and Rocko use a "Drill Wing" combination (Drilbur's Drill Run and Braviary's Wing Attack ), a technique Ash and Cilan quickly learn to counter.
The episode ends with the brothers demonstrating new triple-threat combinations, like "Jet Brave" (Aqua Jet and Brave Bird). Notable Trivia & Production
In general Pokémon history, "Episode 99" often refers to the Orange Islands episode " The Mandarin Island Miss Match " . This older episode is famous for being banned or skipped in many modern re-releases due to its depiction of Jynx in her original design. BW099 - A Surface to Air Tag Battle Team! - Bulbapedia
Cilan famously breaks the fourth wall during this episode by physically pushing apart the split-screens featuring the bickering brothers.
Ash himself owns both of the Water-type species caught in this episode: a Buizel and a Corphish.