|Birth Date:||September 22, 1968|
|Notable Character(s):||Nurse Joy|
- Nurse Joy (Seasons 1-6)
- Cassidy (Seasons 1-5)
- Clair (Season 5)
- Caroline (Season 6)
- Ghost of Maiden's Peak
- James' mother (IL048)
- Dr. Anna
- Suzy (JE053)
- Mary (JE130)
- Erika's Assistant 1 (green hair)
- Boy in green shirt (IL042)
- Woman from Yas Gym
- Pokémon Nursing School Instructor (JE013)
- Contest judge (JE019)
- Townswomen (JE061)
- Girl 4 (JE075)
- Luka Carson
- Annie (Movie 5)
- Mai Valentine (Yu-Gi-Oh! (Until Season 4))
- Scarlet Garcia (Sonic X)
- Sheena Fujibayashi, Lilia (Tales of Symphonia: Dawn of the New World (Uncredited))
- Pamela Tatlin (Tales of the Abyss (Uncredited))
- Kaufman (Tales of Veperia (Uncredited))
- Rangiku Matsumoto, Emilou Apacci, Nemu Kurotsuchi (Bleach)
- Shizune, Tonton (Naruto)
- REM (Bobo-bo Bo-bobobo)
- Villetta Nu (Code Geass)
- Re-l Mayer (Ergo Proxy)
- Gloria (Daphne in the Brilliant Blue)
- Rose Marinade (Fighting Foodons)
- Adiane (Gurren Lagann)
- Sharona (Shaman King)
- Centis, Kanako Shimada (I Dream of Mimi)
- Misaki Saiki (Ghost Talker's Daydream)
- Mion and Shion Sonozaki (Higurashi)
- Lenneth, Hrist, Lorenta, Platina (Valkyrie Profile)
- Lenneth (Valkyrie Profile 2: Silmeria)
- The boy in the green shirt from Showdown at Dark City is an extremely rare occurrence where Hollingshead voices a non-female character
- Since her departure from the series, she along with former Pokémon VA Tara Sands, worked together on "Tales of Symphonia: Dawn of the New World" as Sheena Fujibayashi and Genis Sage respectively, though neither of them were credited for it.
- Megan has had many VA's take on certain roles after her departure from 4Kids:
- Bella Hudson replaced her as both Nurse Joy and Lily in Pokémon until Season 9 as well as Mai Valentine from Yu-Gi-Oh! for Season 4.
- Carrie Keranen filled in for her as Mary from the Pokémon Mystery Club in Season 7.
- Andi Whaley filled in as Cassidy from Team Rocket until Season 9.
- Karen Neill replaced her one-time role as Caroline until Season 9.
- Eileen Stevens filled in for her role as James' mother in Season 12.
- Eva Christensen filled in for her role as Clair in Season 16.