pokedex

Well at least for what I know Pokemon 133 you can get it in hearthome city at the house rigth next to the Pokemon center I think or migrated from Pokemon fire red Pokemon 134you can get it by using a water stone on eevee Pokemon 135 you can get it by using a thunder stone on eevee Pokemon 138 you can get it by tarding a porygon holding a dibious disc pokemon146 go to eterna city and talk to prof.oak he will tell you that 3 rare Pokemon have benspoted in sinho and those are articuno,zapdos,moltres(use pokeradar) Pokemon 146,147 you can get them at mt. Cornet and Pokemon 174 you can get it by using a moon stone on cleefa or rasing it I thik Hope this helps you.

Sinnoh-
133- Route 224 using a Super Rod

134- Route 219 using a Good Rod

135- Route 219 using a Super Rod

137- Route 223 using Surf

138- Mt. Coronet using Super Rod

146- After battling Giratina in Acuity Cavern

147- After battling Giratina in Verity Cavern

148- After battling Giratina in Valor Cavern

174- Make Togepi love you a lot and level him up one

National-
133- Talk to the Battle Girl in the house next to the Pokemon Centre in Hearthome City

134- Use a Water Stone on Eevee

135- Use a Thunder Stone on Eevee

137- Talk to the male Pokefan in the house farthest northeast in Veilstone City

138- Trade Porygon holding an Up-Grade

146- Talk to Professor Oak after getting the National Pokedex(roaming)

147- Talk to Professor Oak after getting the National Pokedex(roaming)

148- Talk to Professor Oak after getting the National Pokedex(roaming)

174- One day this Pokemon is in the Pokemon Mansion

Hope I helped!

~PoKeMaStEr3591