red eyes darkness metal dragon this is for red eyes darkness metal dragon because the card is in japanese: This card can be Special Summoned by removing from play 1 Dragon-Type monster you control. Once per turn, you can Special Summon 1 Dragon-Type monster except "Red-Eyes Darkness Metal Dragon" from your hand or Graveyard.
tiger dragon tiger dragon same reason as above: If you Tribute Summon this card by Tributing a Dragon-Type monster, you can destroy up to 2 face-down Spell or Trap Cards your opponent controls.
red-eyes zombie dragon :This card can be Tribute Summoned by Tributing 1 Zombie-Type monster. When this card destroys a Zombie-Type monster by battle and sends it to the Graveyard, you can Special Summon that monster to your side of the field.