Were there any Pokémon voices in either the original or the dubbed version of the anime that really stood out to you? I definitely have some.
English Lillipup (Kayzie Rogers), for example, is ADORABLE. It was a great idea to make it say "Pup!" like it's barking. Both English and Japanese Noibat (Yuka Terasaki, Marc Thompson) are very endearing as well, with their little cries. Dedenne (Megumi Sato)'s voice is quite cute too, and I think it's a little underrated. I like its "ne ne!" Mika Kanai's Bayleef, Eevee, and Emolga are really soothing and sweet. Both the dub voices for Charmander (Michael Haigney and Tom Wayland) make me want to hug it with its "char char"s! Mew's, well mews in the first movie made me like more, as it reminds me of a little kitten. I was surprised to learn it was voiced by a grown man! And you can't go wrong with Pikachu (Ikue Ohtani)'s "Pika pika!"
Charizard (Shin'ichiro Miki) has some epic roars. Even if it doesn't actually say its name (well, some people can hear its Japanese name "Lizardon", but I can't), that doesn't change the fact that it sounds so cool. Moltres's dub voice in A Legendary Photo Op! (?????) was awesome, especially with the ghost wail effect. I also was impressed with Florges's dub voice (Aurora Bea) in Defending the Homeland! and Beyond the Rainbow. She sounded stoic yet confident. Her original voice (Megumi Hayashibara) is no slouch either.
As for funny or creepy Pokémon voices, I can't think of many, but English Duskull and Dusknoir (Eric Stuart) were pretty intimidating and English Bunnelby and Diggersby were hilarious, especially Diggersby and his over-the-top ham.