Social Butterfly

"Use emotes 100 times in co-op games"

- BTD6 description

 is an Achievement in BTD6, introduced in the 26.0 update. To earn the achievement, the player must use 100 emotes of any kind. Collecting the rewards for the achievement will grant 20.

Strategy
This is mostly an achievement that can be done any time during Co-Op. However, there is an ethical issue with perpetually spamming emotes, and it can be quite a nuisance to players if the emote use is oversaturated; such ethical issue can be seen as "griefing" other players. Try sending only emotes that are necessary within the right context; an example of this is using the "Thumbs Up" emote whenever a player does a good move, which generally can be seen in good light.

Another strategy for getting this achievement without ruining the experience of other players is to wait for all players on Co-Op to leave. If all players on Co-Op leave except yourself, simply spam emotes as much as possible with no downsides.