You have to dress like one of the guards to pass them, but you have to walk like regular people do.
You have to get a balloon.
all you do is get a balloon and sneak past them but pace yourself.
Use the camoflage suit and sneak past the guards while they're not looking.
in red dragon island you need to go to the bonsai hut to get a kimono from the lady and the kimono has a passport in the pocket that will let you get past the guards
You have to recieve training from the ninja master is the little hut near to water.
You go to the docks and sneak past the guards and get inside the door.
You get past through the guards while trying to get the keys to the door, and then you use your magic necklace to get out.
go in the building and cut the bonsai tree and she'll give you a robe then they will see you are from there and let you by
In the first part, to get into the town, you need a passport. If you are in the fortess, you have to throw stink bombs onto them so you can sneek past.
with the camo suit
You have to get the key to the final gate, and then go to the final gate and get through. After that the game will guide you. Good Luck getting past the guards!
you use you ninja eye to see where it is and get past the guards get the key and exit into the next door