There has been a lot of recent talk about Chansey being one of Pokemon GO’s most elite gym defenders, but according to Reddit user PEEFsmash, this myth has been debunked.
Chansey has less EFFECTIVE HP than Dewgong, Rhydon, and Nidoqueen, and less attack than any fully evolved Pokemon. She is not a good gym defender or waller so please stop spreading misinformation,” the user goes on to say.
He then continues to go into a more detailed analysis about why Chansey is actually not the gym defender most users think she is:
Effective Health combines the STA and DEF statistic in the proper way that yields the total real tankiness of a character (this formula is used correctly by both QMike and Professor Kukui’s spreadsheets).
Because Chansey’s defense is so low, her super high STA statistic results in a lackluster overall effective health.
For comparison, here are some Pokemon’s effective health:
Chansey is an absolutely atrotious gym defender, the worst fully-evolved defender in the game with all statistics and moveset taken into consideration. Jynx is even superior to her. Please stop spreading misinformation about her being somehow a good defender due to her HP.”
For what it’s worth, another Reddit user actually released a detailed chart of Pokemon GO’s top 100 gym defenders at level 25 based on a defender’s Total Damage Output: