After clearing the game, assuming you didn't happen to get any of these by chance, the missing numbers in your minion-pedia are
51: Bab-8r 6-2
53: Chidilla 6-2
55: Dogler 6-1
63: Jellyjolt 6-1
83: Kel'ba 6-4
89: Toregg 5-4
They don't show up that often so good luck finishing your encyclopedias.
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