Ekans

From above, if it tucks its tale in.

Parasect

Again, if it tucks in.

Ludicolo

From above.

Seedot

From above.

Castform (Normal form)

From above.

Shuppet

I think the skirt can be tucked in so it looks circular from above.

Snorunt

Again, I think the hands can be tucked in and it will be circular from above.

Drifblim

From above. It's the evolved form of Drifloon which was mentioned in another answer, but, well, they are different Pokémon and Drifblim wasn't explicitly mentioned yet, so...

Happiny

From above, of course.

Solosis

It's... literally a sphere...

Vanillite

The clouds in the picture are NOT a part of the Pokémon, so - from above.

Amoonguss

Another evolved form that wasn't mentioned before. Just needs to tuck its hands in before viewing from above.

Beheeyem

While I'm not quite certain about it's previous evolution (Elgyem), Beehyem can DEFINITELY look round when viewed from above.

Litwick

Is a silhouette a shadow and does a flame affect it then? I think not, so - round from above!

And there were a bunch of others that I wasn't really sure about. To be honest, I wouldn't have included Jigglypuff myself because I think its hands or ears would distort the circle from any angle. It was for this exact reason I omitted a whole bunch of others like Igglybuff, Kabuto, Togepi, Sunkern, Swinub and others.

Ekans

From above, if it tucks its tale in.

_{(source: bulbagarden.net)}

Parasect

Again, if it tucks in.

Ludicolo

From above.

Seedot

From above.

Castform (Normal form)

From above.

Shuppet

I think the skirt can be tucked in so it looks circular from above.

_{(source: bulbagarden.net)}

Snorunt

Again, I think the hands can be tucked in and it will be circular from above.

_{(source: bulbagarden.net)}

Drifblim

From above. It's the evolved form of Drifloon which was mentioned in another answer, but, well, they are different Pokémon and Drifblim wasn't explicitly mentioned yet, so...

Happiny

From above, of course.

_{(source: bulbagarden.net)}

Solosis

It's... literally a sphere...

Vanillite

The clouds in the picture are NOT a part of the Pokémon, so - from above.

_{(source: bulbagarden.net)}

Amoonguss

Another evolved form that wasn't mentioned before. Just needs to tuck its hands in before viewing from above.

_{(source: bulbagarden.net)}

Beheeyem

While I'm not quite certain about it's previous evolution (Elgyem), Beehyem can DEFINITELY look round when viewed from above.

_{(source: bulbagarden.net)}

Litwick

Is a silhouette a shadow and does a flame affect it then? I think not, so - round from above!

_{(source: bulbagarden.net)}

And there were a bunch of others that I wasn't really sure about. To be honest, I wouldn't have included Jigglypuff myself because I think its hands or ears would distort the circle from any angle. It was for this exact reason I omitted a whole bunch of others like Igglybuff, Kabuto, Togepi, Sunkern, Swinub and others.

Do I have to post one answer per Pokémon? There's a whole bunch not mentioned yet... Let's do it this way: if you agree to any or all of them, just upvote. If you disagree with some, leave a comment. If 10 people object to one, I'll remove it.

Here we go:

Ekans

From above, if it tucks its tale in.

Parasect

Again, if it tucks in.

Ludicolo

From above.

Seedot

From above.

Castform (Normal form)

From above.

Shuppet

I think the skirt can be tucked in so it looks circular from above.

Snorunt

Again, I think the hands can be tucked in and it will be circular from above.

Drifblim

From above. It's the evolved form of Drifloon which was mentioned in another answer, but, well, they are different Pokémon and Drifblim wasn't explicitly mentioned yet, so...

Happiny

From above, of course.

Solosis

It's... literally a sphere...

Vanillite

The clouds in the picture are NOT a part of the Pokémon, so - from above.

Amoonguss

Another evolved form that wasn't mentioned before. Just needs to tuck its hands in before viewing from above.

Beheeyem

While I'm not quite certain about it's previous evolution (Elgyem), Beehyem can DEFINITELY look round when viewed from above.

Litwick

Is a silhouette a shadow and does a flame affect it then? I think not, so - round from above!

And there were a bunch of others that I wasn't really sure about. To be honest, I wouldn't have included Jigglypuff myself because I think its hands or ears would distort the circle from any angle. It was for this exact reason I omitted a whole bunch of others like Igglybuff, Kabuto, Togepi, Sunkern, Swinub and others.

Ekans

From above, if it tucks its tale in.

Parasect

Again, if it tucks in.

Ludicolo

From above.

Seedot

From above.

Castform (Normal form)

From above.

Shuppet

I think the skirt can be tucked in so it looks circular from above.

Snorunt

Again, I think the hands can be tucked in and it will be circular from above.

Drifblim

From above. It's the evolved form of Drifloon which was mentioned in another answer, but, well, they are different Pokémon and Drifblim wasn't explicitly mentioned yet, so...

Happiny

From above, of course.

Solosis

It's... literally a sphere...

Vanillite

The clouds in the picture are NOT a part of the Pokémon, so - from above.

Amoonguss

Another evolved form that wasn't mentioned before. Just needs to tuck its hands in before viewing from above.

Beheeyem

While I'm not quite certain about it's previous evolution (Elgyem), Beehyem can DEFINITELY look round when viewed from above.

Litwick

Is a silhouette a shadow and does a flame affect it then? I think not, so - round from above!

And there were a bunch of others that I wasn't really sure about. To be honest, I wouldn't have included Jigglypuff myself because I think its hands or ears would distort the circle from any angle. It was for this exact reason I omitted a whole bunch of others like Igglybuff, Kabuto, Togepi, Sunkern, Swinub and others.