Tanstro has Sleepy, which makes it enter battle afflicted with Gold Sleep.

Sleep (眠り Sleep), represented by the icons Sleep and Super Sleep, is a status condition in Fossil Fighters and Fossil Fighters: Champions that prevents the afflicted vivosaur from using skills or swapping to the EZ (though rotation is permitted in Champions) and reduces its Evasion to 0. Sleep normally lasts one turn, but a sleeping vivosaur will wake up if it is hit with an attack (two attacks if afflicted with Gold Sleep) or cured by Rallying Cry or Neutralize.

Vivosaurs with the Sleepy ability will enter battle afflicted with Gold Sleep.

Vivosaurs with Sleep Skills

# Image Vivosaur Element
055 Lexo Medal FFC Lexo Earth Earth Medal
060 Pelto Medal FFC Pelto Earth Earth Medal
060 Zanth Medal FFC Zanth Earth Earth Medal
082 Jara Medal FFC Jara Neutral Neutral Medal
088 Guera Medal FFC Guera Neutral Neutral Medal
090 Arsith Medal FFC Arsith Earth Earth Medal
106 Archaeo Medal FFC Archaeo Water Water Medal
111 Nigo Medal FFC Nigo Earth Earth Medal
122 Berta Medal FFC Berta Water Water Medal
140 Tophis Medal FFC Tophis Neutral Neutral Medal
144 Desmo Medal FFC Desmo Fire Fire Medal
150 Tonzilla Medal FFC Tonzilla Earth Earth Medal
157 B-Jara Medal FFC B-Jara Fire Fire Medal