BT12 Agumon and Greymon are there for extra searching and getting to play your Matt&Tai for free if possible. Pride Memory Boost lets you play one of your rookies free if it sees them. Was running Izzy, but searching the top 3 too often hit the option, the Matt&Tai, Nokia, or Alter S and got no memory from it. May want to kick it up to 3 of each of the level 6's taking out a BT12 Agumon and the Black Memory Boost. Alternatively, you can run all Black Memory Boosts instead of the Prides.