The following Pokémon have different values for 6th generation base experience
between Bulbapedia's Gen V-VI list of Pokémon by effort value yield and the
Pokédex on veekun.com:

pokemon	bulbapedia	veekun
butterfree	173	178
beedrill	173	178
pidgeot	211	216
pikachu	105	112
raichu	214	218
nidoqueen	223	227
nidoking	223	227
clefable	213	217
wigglytuff	191	196
vileplume	216	221
poliwrath	225	230
alakazam	221	225
victreebel	216	221
golem	218	223
ampharos	225	230
bellossom	216	221
azumarill	185	189
jumpluff	203	207
beautifly	173	178
exploud	216	221
staraptor	214	218
roserade	227	232
rotom-heat	154	182
rotom-wash	154	182
rotom-frost	154	182
rotom-fan	154	182
rotom-mow	154	182
snivy	28	62
tepig	28	62
oshawott	28	62
stoutland	221	225
unfezant	215	220
gigalith	227	232
seismitoad	225	229
leavanny	221	225
scolipede	214	218
krookodile	229	234
darmanitan-zen	168	189
kyurem-black	297	315
kyurem-white	297	315

References:
bulbapedia: http://bulbapedia.bulbagarden.net/wiki/List_of_Pok%C3%A9mon_by_effort_value_yield_(Generation_V-VI)
veekun: https://veekun.com/dex/pokemon/search?sort=id&column=id&column=icon&column=name&column=base_experience&stat_hp=0%2B&display=custom-table