Question: Who voiced a character that has a pet pet platypus?

Context paragraphs:
List of Littlest Pet Shop episodes: "Littlest Pet Shop" is a 2012 Canadian–American animated television series developed by Tim Cahill and Julie McNally-Cahill.  The series is based on Hasbro's "Littlest Pet Shop" toy line, and features Blythe Baxter (voiced by Ashleigh Ball, with the character based off the doll of the same name) as the main protagonist, as well as other characters who reside in Downtown City, a city modeled after New York City.  Along with Blythe is her father, Roger Baxter (voiced by Michael Kopsa), and her employer Mrs. Anna Twombly (voiced by Kathleen Barr) at the nearby pet store, Littlest Pet Shop.  Away from home, she maintains several friends at her local high school.  As well as the human cast are her seven animal companions, who reside within Littlest Pet Shop during the day, that Blythe unexpectedly gains the ability to communicate with.

Phineas and Ferb (season 3): The third season of "Phineas and Ferb" first aired on Disney Channel on March 4, 2011, and on Disney XD on March 7, 2011.  The season features two step-brothers on summer vacation trying to make every day the best day ever, while their sister tries to bust them.  The five main characters are: brothers Phineas Flynn and Ferb Fletcher, secret agent Perry the Platypus (who's also the pet of Phineas and Ferb), the evil scientist Dr. Heinz Doofenshmirtz, and the brothers' older sister Candace Flynn.

Phineas Flynn: Phineas Flynn is one of the protagonists of the animated television series "Phineas and Ferb".  Voiced by Vincent Martella and created and designed by Dan Povenmire, Phineas first appeared along with the rest of the series' main characters in the pilot episode "Rollercoaster."  Phineas, along with his stepbrother Ferb Fletcher, star in each A-Plot of every episode.

Lawn Gnome Beach Party of Terror: "Lawn Gnome Beach Party of Terror" is the second broadcast episode of the animated television series "Phineas and Ferb."  In it, stepbrothers Phineas and Ferb construct an elaborate beach complex in order to survive the intense heat wave that has struck their city.  Meanwhile, the boys' pet platypus, Perry, successfully halts the destruction of all the lawn gnomes in the tri-state area by his nemesis, Dr. Heinz Doofenshmirtz.

PETSCII: PETSCII ("PET Standard Code of Information Interchange"), also known as CBM ASCII, is the character set used in Commodore Business Machines (CBM)'s 8-bit home computers, starting with the PET from 1977 and including the VIC-20, C64, CBM-II, Plus/4, C16, C116 and C128.

Phineas and Ferb: Phineas and Ferb is an American animated musical comedy television series.  Originally broadcast as a one-episode preview on August 17, 2007 and again previewed on September 28, 2007, the series officially premiered on February 1, 2008 on Disney Channel, and follows Phineas Flynn and his British stepbrother Ferb Fletcher on summer vacation.  Every day, the boys embark on some grand new project, which annoys their controlling sister, Candace, who frequently tries to reveal their shenanigans to her and Phineas' mother, Linda Flynn-Fletcher, and less frequently to Ferb's father, Lawrence Fletcher.  The series follows a standard plot system; running gags occur every episode, and the b-plot almost always features Phineas and Ferb's pet platypus Perry the Platypus working as a spy ("Agent P") for OWCA (the Organization Without a Cool Acronym), to defeat the latest scheme of Dr. Heinz Doofenshmirtz, a mad scientist driven largely by a need to assert his evilness.  Sometimes, other villains scoff at his level of evil.  The two plots intersect at the end to erase all traces of the boys' project just before Candace can show it to their mother.  This usually leaves Candace very frustrated.

Jammers (film): Jammers is an American animated short pilot created by Lizz Hickey for Cartoon Network.  It follows the story of a middle schooler girl named Carol (voiced by Hickey herself), with her best friends Jeremy and Danny (respectively voiced by Michael Showalter and Steve Little), which together form a trio called "Jammers".  Carol is supported by her aide subconscious named Lil' Carol (voiced by Natasha Leggero), that is a flying head by her own appearance, and by her two-legged pet frog named Timtam.

Perry the Platypus: Perry the Platypus, also known as Agent P or simply Perry, is an anthropomorphic platypus from the American animated series "Phineas and Ferb."  Perry was created by the series' co-founders, Dan Povenmire and Jeff "Swampy" Marsh.  He first appeared along with the majority of the main cast in the pilot episode "Rollercoaster."  Perry is featured as the star of the B-plot for every episode of the series, alongside his nemesis Dr. Heinz Doofenshmirtz.  A mostly silent character, his lone vocal characteristic (a rattling of Perry's beak) was provided by Dee Bradley Baker.

Kelly Metzger: Kelly Metzger is a Canadian voice and theater actress, born in Edmonton and based in Vancouver, British Columbia.  After making her debut in the title role of "Anne of Green Gables", she performed on the stage with several Vancouver based theatrical companies.  After this, she began a career in voice acting.  Among her more noted voice acting roles are the English voice of Sayu Yagami in the anime series based on the "Death Note" manga, the character of Buttercup in "Powerpuff Girls Z", the voice of Spitfire in "" (excluding the episode "Sonic Rainboom", where she was voiced by Nicole Oliver), the voice of Nya in the Cartoon Network series "", and the voice of Sugar Sprinkles and Kora Dixon in "Littlest Pet Shop".  She also voiced Makena in "".  Metzger also does the singing voice of the character Gloriosa Daisy in the 2016 film "".

List of The Pet Girl of Sakurasou episodes: "The Pet Girl of Sakurasou" is a 24-episode anime television series adaptation, produced by J.C.Staff and directed by Atsuko Ishizuka, that aired in Japan between October 9, 2012 and March 26, 2013 on Tokyo MX.  It has been licensed by Sentai Filmworks in North America.  The series was also simulcasted on Crunchyroll.  The series makes use of five pieces of theme music: three opening themes and two ending themes.  The first opening theme is "Kimi ga Yume o Tsuretekita" (君が夢を連れてきた ) sung by Pet na Kanojotachi, consisting of Ai Kayano, Mariko Nakatsu, and Natsumi Takamori.  The first ending theme "Days of Dash" is by Konomi Suzuki.  From episode 13 onwards, the second opening theme is "Yume no Tsuzuki" (夢の続き ) by Konomi Suzuki.  The second ending theme is "Prime Number (Kimi to Deaeru Hi)" (Prime Number ~君と出会える日~ ) by Asuka Ookura.  The opening theme of episode 14 is "I Call Your Name Again" by Mariko Nakatsu under her character name Nanami Aoyama.

Supporting paragraphs: Lawn Gnome Beach Party of Terror Phineas Flynn
Answer: Vincent Martella