Reinuclite:Victory Road-Ruin - Requires Rock Climb and Tesseract
Aerodactylite:Holon Volcano - Requires Tesseract
I made an earlier post about the Houndoominite.
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Alternate Aerodactylite idea:Holon Desert Cave-Requires Dig and Relic Song
Going into more detail of the locations of each stone,the Reinuclite would be in the area where you find Virizion and the Aerodactylite would be northeast of where you fight Delta Registeel (Alternatively,it would be given by a Relic Song wall behind where you find Delta Buneary).