Squishy/Personality and characteristics

Squishy, being a Core, keeps a regular check of nature through its other cells that are scattered throughout the region. Squishy uses these cells as surveillance cameras, and will always check with its cells before falling asleep. If it senses that enemies are approaching, it will wake any traveling companions up to warn them. When in danger, as shown in From A to Z!, it calls upon these cells to change its form.

As shown when it tried to escape from the group, Squishy doesn't fully trust humans; this may stem from the experiments it was subjected to at the hands of Team Flare. It only warmed up to the group when they rescued it from Celosia, and even then, it didn't fully trust them until they defended it a second time. In Meeting at Terminus Cave!, it showed a moment's hesitation before heading to the center of Terminus Cave, looking back at Ash's group before plunging down a chasm. While communicating with Z2 in A Cellular Connection!, Squishy disagreed with Z2's unfavorable opinion on humankind, and expressed the desire to continue observing them. However, through the journey with Bonnie and her friends, Squishy developed more belief in humans and Pokémon, as evidenced with its opinion on Ash and Greninja in Seeing the Forest for the Trees!, and when it tries to convince Z2 to believe in them and save the Kalos region in Rocking Kalos Defenses! and Forming a More Perfect Union!.

As seen in the Japanese version of Dream a Little Dream from Me!, it tends to refer to itself in collective, as it is a part of the bigger Zygarde. Squishy is highly ticklish, as shown on its first encounter with the group and in Puni-chan's Song. Its biggest fear is a fiery ghost who constantly tries to attack and capture it.