Each Pokeball is linked to a 5 second clip of a song. Identifying the songs results in a strange set of songs - searching for several of these songs together shows that they are all songs that were covered by Weird Al Yankovic in one of his polka medleys. Each song is in one polka medley, which have a specific order. For example, "Jocko Homo" by Devo is the first song in Weird Al's first medley, "Polkas on 45". The songs are ordered first by in which polka medley they appear, and then by their order within that medley.
The grid of letters in dots below the Pokeballs represents the track listings of the Weird Al polka medleys. There are 11 rows of varying length: the length is the number of songs in each medley. Each song gives a row and column position, from which you can get one letter. For example, "Jocko Homo" would give you the first row, first column, which is the letter T.
Just reading the letters in the order the songs are given is nonsense, so there must be another ordering. On mouseover, each Pokeball displays an image of a Pokemon. The Pokemon are given in Pokedex order. However, these are also the first 20 Pokemon that are listed in Weird Al's song "Polkamon" (another polka!). Resorting by the order that the Pokemon appear in "Polkamon" gives the answer UNLEADED PETROL TANKER.
The title "Dots" clues polka dots. Ha ha ha.
|Pokeball||Position in song "Polkamon"||Pokemon||Song||Artist||Polka medley #||Position in polka medley||Letter|
|2||9||Butterfree||L.A. Woman||The Doors||1||5||P|
|3||16||Nidoqueen||Owner of a Lonely Heart||Yes||2||6||A|
|4||6||Zubat||Bang Your Head (Metal Health)||Quiet Riot||2||11||D|
|5||12||Oddish||Rock Me Amadeus||Falco||3||10||R|
|6||3||Venonat||Brown Sugar||The Rolling Stones||4||2||L|
|7||4||Mankey||Pump up the Jam||Technotronic||5||5||E|
|8||13||Poliwag||Ice Ice Baby||Vanilla Ice||5||15||O|
|11||20||Seel||Black Hole Sun||Soundgarden||7||10||R|
|12||1||Krabby||Everybody (Backstreet's Back)||The Backstreet Boys||8||4||U|
|13||5||Chansey||Ray of Light||Madonna||8||8||A|
|14||14||Goldeen||Chop Suey||System of a Down||9||2||L|
|15||8||Ditto||Down With the Sickness||Disturbed||9||7||D|
|16||19||Aerodactyl||Renegades of Funk||Rage Against the Machine||9||8||E|
|18||2||Snubbull||Gold Digger||Kanye West||10||15||N|
|20||10||Lugia||I Kissed a Girl||Katy Perry||11||9||E|