There are several Status Effects you can be afflicted with during battle:
Icon
Name
Effect
Burn
Burns random Tsums on the field. Player takes damage every second from every Tsum affected by Burn until they are removed.
Poison
Poisons random Tsums on the field. Player takes damage every time they remove Tsums affected by Poison.
Freeze
Freezes random Tsums on the field. These Tsums cannot be made into Chains and occupy space on the field until unfrozen by Chains, Skills or Bombs. A Frozen Tsum takes two hits before it is unfrozen.
Monochrome
Drains all the color from the tsums turning them to black and white gamma. For some players this makes it more difficult to make chains.
Disable
Disables Tsums around the Villain. These Tsums cannot be made into Chains and occupy space on the field until removed by Skills or Bombs.
Wind
Swirls random Tsums around the field. Although this does not deal any damage, the player might find it harder to make chains.
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Anti-gravity
Makes Tsums fly up in the field. The movement and increasing gaps between them make it harder to make Chains.