http://www.tski.co.jp/baldio/patch/19991208.html
This was the patch that guards were buffed in. And P99 launched with these buffed guards. You really have nothing to stand on except your memory.
Subsequently the Newbie Guards were buffed and changes were made to guard timers:
http://www.tski.co.jp/baldio/patch/20000512.html
P99 launched with this respawn timer as well.
Again, unless you post actual evidence, this thread has no merit and you should close it.