Being the first season ever created, 4 emotes are unlocked from the beginning as starter items. 2 of them are free rewards after reaching a certain level. 1 of them can be unlocked by buying the Collector's Pack. The other emotes can be bought from the shop, if they are in the daily rotation, spending Kudos or Crowns.
Season 2 (Legacy) has 2 emotes which are free rewards by reaching a certain level. The other emotes can be bought from the shop, if they are in the daily rotation, spending Kudos or Crowns.
Season 3 (Legacy) has 2 emotes which are free rewards by reaching a certain level. The other emotes can be bought from the shop, if they are in the daily rotation, spending Kudos or Crowns.
Season 4 (Legacy) has 1 emote that is a free reward by reaching a certain level. The other emotes can be bought from the shop, if they are in the daily rotation, spending Kudos or Crowns.
Season 5 (Legacy) has 1 emote that is a free reward by reaching a certain level. The other emotes can be bought from the shop, if they are in the daily rotation, spending Kudos or Crowns.
In the case of some costumes that cover the Faceplate, any eye expressions in the emote are lost. This is due to varying reasons: costumes covering the faceplate (or at least the eyes) completely, or replacing it with static eyes on the visors.