>>29695609intelligent enough to be able to actively warn people of approaching disaster, which implies the ability to think about the future and that they may see benefit in keeping the humans around them alive.
other than that, the anime often shows pokémon understanding human speech and are able to exchange abstract concept between other pokémon via speech.
i'd say they have a grasp of human-level abstract concepts while they are dependent on interaction and contact with humans to bring out their mental abilities to human-level.
mind that we cant really prove or disprove anything here unless GF explicitly says so.