It is based on thier Personality Value. If it is less then 5 it'll evolve into a Silcoon but if it is more then it'll evolve into a Cascoon. Unfortunelty, the only way to find this out is if you capture one and check its stats. So if you want a Cascoon, you have two choices:

1. Catch a Wurmple, evolve it, and if it turns into a Silcoon deposit/release it and try again. They are commonly found in Petalburg Woods, and Routes 101, 102, and 104 in Ruby/Sapphire/Emerald; and commonly in Eterna Forest and putting Sweet Honey on trees in Diamond and Pearl.
2. Skip the first evolution and catch a Cascoon, they are uncommonly found in Petalburg woods in Ruby/Sapphire/Emerald; and commonly in Eterna Woods and putting Sweet Honey on trees in Pearl.

Unlucky coincidence, keep trying and you'll eventually get a Wurmple which evolves into Cascoon. If you don't want to waste money or Pokeballs, after you used your last Pokeball on a Wurmple which evolves into a Silcoon, turn off your game without saving and start the process all over again, eventually you'll have to get one which evolves into a Cascoon.

Oh ok. I'll just ignore those Berries for now.

I have a small question: How can I get the chart thing or whatever its called for the PokeRader.....Chaining? I could only get up to 11.

There are many charts out there, but as a general tip here is how you can create a long chain:

1. Repels are your friend. Pokemon found with the Pokeradar aren't effected by Repels, so use them to keep normal Wild Pokemon from attacking and breaking your chain. Cleanse Tag also works like a Repel, though it might not be as trusty as Repels.
2. When the grass shakes, there is something, look for the following: if the grass is the same type you started the chain in and how far away it is. Usually the further away that grass is gives you a higher chance of encountering a Pokemon of that same Species.
3. The Poketch's "Trainer Counter" will further help you keep track on how long a chian you make. You get it by going to the Pal Park and talking with Professor Oak.

Other then that, it really relies on luck.

0_o

Umm, I don't think there is a place where I could research that. If I had to make a guess:

EP001 "Pokemon - I Choose You!" is the most seen.
AG101 (Unaired) "Shaking Island Battle! Dojoach VS Namazun!!" is the least seen.

Not to mention it's really hard to answer since there's no way to measure the actual number of people who watch an episode of Pokemon (or any show). Even if it's based on ratings, there are still people who could've watch it, that don't tell anyone they did. For example if it is known that at least 10 million people saw the first episode of Pokemon. But only at least 8 million people saw the next one, it's still possible that it was viewed by the same number of people as the first episode, just didn't get enough feedback as the first one.

Apart from having a super power, there is no way to tell. But I'll agree with Pikachu, the ones he chose seem to make sense. Especially AG101 that wasn't even aired in Japan.

Yes, it was banned because Jynx was the main Pokemon in that episode.

Only was banned in the United States. This is from the Banned Episode article from Bulbapedia explaining the whole thing:

Thanks!!

I have another question: [No one has helped me with this on the "New Contibution Thread here, so here it is"]: When I add an episode to Pokemon it is rejected, saying I need a source. What is that? Please don't tell me to go to the Help Forums or whatever. I was told to go there to find out how to get the "e" With the line on top but I didn't find it.

It was banned on TV, though it is one the DVD sets. However "The Ice Caves" isn't on any DVD (though that might because not all the Johto seasons haven't been released in Box Sets yet).