User blog comment:TheHandsomePlant/Zombie Waves - used for future editing/@comment-25154254-20150303132356/@comment-25089892-20150307013117

Yeah, but in PvZ1 zombie randomizing is priority in levels. Which means about 75 to 90% of zombies in level are always randomized. This is completely different in PvZ2 where part of the randomized zombies reaches somewhere to 10% of the level (excluding Pinata Parties and Endless Zones)