Seel

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Every image can be answered by a phrase fitting the given enumeration that includes a pokémon type as a substring. These types can be chained according to the inequalities, where "<" means "takes double damage from". Use the indexes appearing in the inequality to index into the answer phrases:

Answer PhraseTypeIndexLetter
RADAR KINGDARK9G
COMB UGANDABUG2O
FLAG OF IRELANDFIRE5O
OTTAWA TERMITEWATER10M
SELECT RICKY MARTINELECTRIC11Y
FAIR YOUTHFAIRY2A
TWENTY-FIRST EELSTEEL4N
BIG ROUND TABLEGROUND8D
MARDI GRAS STARGRASS2A
EXPO IS ON TVPOISON2X
GYPSY CHICKENPSYCHIC11E
WRONG HOSTAGESGHOST1W

This yields the clue phrase GOOMY AND AXEW, which are both pokémon DRAGONS.