Twilight Poachers

Battleground
This is a time-attack stage, the player must knock out the Enemy Base before time run out, or Assassin Bears will be spawned infinitely to force lose the battle.
 * 5 seconds since the start: the Boss - Doper P.D - appears.
 * A single Assassin Bear will spawn at 50 and 76.67 seconds since the start.
 * Assassin Bear will appears infinitely at 103.33 seconds since the start.
 * One Assassin Bear will also spawn when the Enemy Base's health is down to 99%

Reference

 * http://battlecats.spica-net.com/chaplegend/s31.html