Rosemon

Level 3 Digimon and Searchers

• 4 Palmon (BT14-044): Reduces digivolution cost by 1.
• 4 Lalamon (BT13-049): Searches; finds Yoshino as well; reduces digivolution cost by 1.
• 2 Palmon X Antibody (BT15-045): Memory gain combo with BT14 Palmon; adds memory for tamers.
• 4 Mimi Tachikawa (BT14-085): Searches; adds memory; immune to flood gates.

Level 4 Digimon

• 4 Sunflowmon (BT13-050): Reduces digivolution cost by up to 3, at least 1.
• 4 Togemon (BT14-046): Cheats tamers out; reduces digivolution cost by 1.
• 2 Sunflowmon (BT10-048): Virtually inflates level 3s and enables swarm strategy by cheating level 3s and 4s out; draws cards.

Level 5 Digimon

• 4 Blossomon (BT3-054): Always digivolves for 0.
• 4 Lillymon (BT14-049): Removes Floodgates; super cheap hard play, blast digivolve and almost always digivolves for 0.
• 2 Lilamon (BT13-054): Cheats out Yoshino; almost always digivolves for 0.

Level 6 Digimon

• 4 Rosemon (BT13-057): Unsuspends itself; enables burst digivolution; suspends 2 cards.
• 2 Rosemon (BT14-053): Unsuspends itself; enables burst digivolution; suspends only 1 card.

Level 7 Digimon

• 4 Rosemon: Burst Mode (BT13-060): Can be burst digivolved; suspends 2 cards; freezes entire board; trashes security.

Tamers

• 4 Yoshino Fujieda (BT13-100): Adds and sets memory; enables burst digivolution.

Options

• 2 Green Scramble (LM-030): Virtually inflates level 3s, Rosemons and Rosemon: Burst Modes.

Digitama

• 4 Kokomon (EX4-002): Always draws at least 1 card.
  
• 1 Gummymon (EX2-004): Almost always draws at least 1 card.