The Pokémon Company International have released a Pokémon TV app for iOS, also stating that an Android version is coming soon.

The free app allows users to watch select episodes of the Pokémon anime from various seasons while on the go. The app requires iOS 5 or later and is downloadable on iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (3rd generation), iPod touch (4th generation), iPod touch (5th generation) and iPad.

Source: iTunes App Store, Pokemon.com

UPDATE: Android version has just been released. It requires Android 2.3 or later.

Source: Google Play

The episodes available to watch on the app are as follows:

Kanto:

S2E2 The Purr-fect Hero

S2E3 Riddle Me This

S2E4 Volcanic Panic

S2E5 Beach Blank-out Blastoise

S2E6 The Misty Mermaid

S2E7 Clefairy Tales

S2E8 The Battle of the Badge

S2E9 It's Mr. Mime Time

S2E11 Snow Way Out!

S2E12 ******** at the Po-ké Corral



Johto:

S4E23 Houndoom's Special Delivery

S4E24 A Ghost of a Chance

S4E25 From Ghost to Ghost

S4E26 Trouble's Brewing

S4E27 All That Glitters!

S4E28 The Light Fantastic

S4E29 UnBEARable

S4E30 Moving Pictures

S4E31 Spring Fever

S4E32 Freeze Frame



Hoenn:

S7E46 Lights, Camperupt, Action!

S7E47 Crazy as a Lunatone

S7E48 The Garden of Eatin'

S7E49 A Scare to Remember

S7E50 PokéBlock, Stock, and Berry

S7E51 Lessons in Lilycove

S7E52 Judgment Day!

S8E1 Clamperl of Wisdom

S8E2 The Relicanth Really Can

S8E3 The Evolutionary War



Sinnoh:

S11E52 Sleepless in Pre-Battle

S12E1 Get Your Rotom Running

S12E2 A Breed Stampede

S12E3 Ancient Family Matters

S12E4 Dealing With Defensive Types

S12E5 Leading a Stray

S12E6 Steeling Peace of Mind

S12E7 Saving the World from Ruins

S12E8 Cheers on Castaways Isle!

S12E9 Hold the Phione!



Unova:

S14E32 Facing Fear with Eyes Wide Open!

S14E33 Iris and Excadrill Against the Dragon Buster!

S14E34 Gotta Catch a Roggenrola!

S14E35 Where Did You Go, Audino?

S14E36 Archeops in the Modern World!

S14E37 A Fishing Connoisseur in a Fishy Competition!

S14E38 Movie Time! Zorua in "The Legend of the Pokémon Knight"!

S14E39 Reunion Battles in Nimbasa!

Just downloaded it, the episode selection looks pretty great and I will have to start watching them later.

Hm, this could give me an uncomplicated way to get back into watching the anime on a regular basis.

Alright, I downloaded the app. Expect a lot of buffering if you're on a slow connection, but that's to be expected if you're watching any kind of video without much bandwidth.

Also, I think the aspect ratios are messed up on some of the episodes. According to reviews, some folks have been having all episodes stretched to 16:9, but I've been having all episodes stretched to 4:3. I hope they update it to fix that.

THANK-YOU Pokemon for actually releasing an app on the Android instead of the Apple ONLY thing you did with that Pokedex. xP Well, as soon as my phone charges up, I know what I'm going to download (so long as I have enough room this time to download an app).