Dukemon (Gallantmon) Tempo
Overview
[BT2-020] Dukemon (or Gallantmon) has, when digivolving, the ability to destroy an opponent's digimon with 6000 DP or less. While 6000 DP does not sound like much, we are reminded that most blocker digimons (except Cherrymon and black digimons) have only 6000 DP.
Other than that, he also has a rare second effect that, when attacking, discards 1 of your opponent's security for every 10 cards your opponent has in their trash. An effect that discards security without resolving its effects, is very powerful and unprecedented in BT-02 Ultimate Power.
Mechanism

Being a tempo deck, this mechanism is slower than the very popular Omegamon Turbo profile: a total of 7 memory (2 more than the Turbo) to digivolve from a digitama into a LV6 digimon. However, while Omegamon Turbo focuses on playing your ace digimon [BT1-084] Omegamon with very little in-between, this deck allow for larger versatility!
The [BT2-020] Dukemon is a highly skewed digimon. Not only is he expensive to digivolve, but his usage is also very conditional: he can only destroy a digimon with 6000 DP or below (which also requires at least a red tamer fielded) and can only activate his security-discarding effect when there are 10 or more cards in your opponent's trash.
Furthermore, to top it off he only has 11000 DP during your opponent's turn, making him very vulnerable to most LV6 digimons while suspended. So how do we play this deck?
Stockpiling +DP effects
With relatively low DP, Dukemon benefits vastly from stockpiling effects that grant additional DP during your turn. These include the tamer card [ST1-12] Tai Kamiya and inheritable effects from [ST1-03] Agumon and [ST2-017] WarGrowlmon, which could push Dukemon's DP past the 12000 mark allowing him to destroy suspended LV6s.
With tempo mechanics and an emphasis on digimon-destroying effects, there is a good chance to fill the opponent's trash up to 10 cards during mid game, which would allow Dukemon to activate his security-discarding effect. This deck requires the player to carefully read the game and make correct decisions in order to control the flow of the game!