The first one is the krab to the left once you get a little bit into "beach".

To get the second one, in the "tunnel" once you get to the pikachu whos standing by the egg, throw apples so that pikachu follows them to the egg. Then play the poke flute. Pikachu will use one of his thunder attacks and break the egg. Zapdose will come out of the egg and put energy into the funny machine on your right. When you enter the next room, wait a bit and once you pass both of the screens (that now have pictures on them because of the energy from Zapdose) on your right, there is the wall with a picture of Pincher. That is the sign.

In the "Volcano" level, as soon as you start, look to your left. There is the really small little volcano. Look up into it. One of the smogs of smoke that comes out of it will look like a Koffing. That is the sign.

In the "river" level, the sign is around the first corner. When you see the Vileplume, play the pokeflute. It will start to dance and all the smoky stuff that was coming out from it before will now be gone. Look way up and you will see that the tree behind the Vileplume looks like a Cubone.

In the "cave" level wait until you come into the part of the cave where the Koffings are chasin the Jigglypuffs. Then once your near the Weepinbell, look to your left. There will be a whole bunch of sparkles. Take a picture of the biggest one. That will be the sign and it is a Mewtwo.

In the "valley" level, look up slightly and there will be a mountain that looks like a Dugtrio. Take a picture of it and that is the last sign.

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beach tunnel valley river cave volcano

i all ready have all but the volcano signs but nun of the pufs of smoke look like koffing wich exact puff looks lick him